Le Coz, Erwann; Zhang, Ziyun; Roisnel, Thierry; Cavallo, Luigi; Falivene, Laura; Carpentier, Jean-Francois; Sarazin, Yann published the artcile< Barium-Catalysed Dehydrocoupling of Hydrosilanes and Borinic Acids: A Mechanistic Insight>, COA of Formula: C9H11Br, the main research area is barium catalyst dehydrocoupling mechanism kinetics hydrosilane borinic acid chemoselective; crystal structure mol barium toluene boryloxide complex preparation; alkaline earth metals; barium; borasiloxanes; density functional calculations; reaction mechanisms.
Two very rare cases of barium boryloxides, the homoleptic [Ba(OB{CH(SiMe3)2}2)2·C7H8] and the heteroleptic [{LONO4}BaOB{CH(SiMe3)2}2] stabilized by the multidentate aminoetherphenolate {LONO4}-, are presented, and their structural properties are discussed. The electron-deficient [Ba(OB{CH(SiMe3)2}2)2·C7H8] shows, in particular, resilient η6-coordination of the toluene mol. Together with its amido parents [Ba{N(SiMe3)2}2·thf2] and [Ba{N(SiMe3)2}2]2, this complex catalyzes the fast and chemoselective dehydrocoupling of borinic acids R2BOH and hydrosilanes HSiR’3, yielding borasiloxanes R2BOSiR’3 in a controlled fashion. The assessment of substrate scope indicates that, for now, the reaction is limited to bulky borinic acids. Kinetic anal. shows that the rate-limiting step of the catalytic manifold traverses a dinuclear transition state. A detailed mechanistic scenario is proposed on the basis of DFT computations, the results of which are fully consistent with exptl. data. It consists of a stepwise process with rate-determining nucleophilic attack of a metal-bound O-atom onto the incoming hydrosilane, involving throughout dinuclear catalytically active species.
Chemistry – A European Journal published new progress about Borinic acids Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 576-83-0 belongs to class bromides-buliding-blocks, and the molecular formula is C9H11Br, COA of Formula: C9H11Br.
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary